The RMFI.18000Sfm from Response Microwave Inc is a Low Pass RF Filter with Frequency DC to 18000 MHz, Insertion Loss 0.3 dB, Rejection 70 dB, Power 1 W, VSWR 1.60:1. Tags: Module with Connector, Chebyshev Filter. More details for RMFI.18000Sfm can be seen below.